star a and star b have measured stellar parallax of 0.58 arc second and 0.73 arc second, respectively. which star is closer?
1 answer:
Star B is closer than star A, because 1/ 0.58 = 1.72 pc, while 1/.73 = 1.36 pc.
<h3>What is stellar parallax and distance measurement using stellar parallax?</h3>To calculate the distances to nearby stars, astronomers employ a phenomenon known as parallax. The apparent displacement of an object due to a change in the viewer's point of view is known as parallax. The distances between close stars can be calculated using this phenomenon. A nearer star will seem to move against the farther-off background stars as the Earth revolves around the Sun. By measuring a star's position once, then again six months later, astronomers can establish the apparent shift in location of that star. The apparent motion of the star is referred to as stellar parallax.
A straightforward correlation exists between the distance of a star and parallax angle:
The distance d and parallax angle p are both measured in parsecs and arcseconds, respectively.
Stellar parallax of star A= 0.58 arcseconds
Stellar parallax of star B= 0.73 arcseconds
So, on applying the formula,
The distance of the star A= 1.72pc
And the distance of the star B= 1.36pc
Therefore, star B is closer than star A.
To know more about stellar parallax, visit:
#SPJ4
You might be interested in
<em>There are some placeholders in the expression, but they can be safely assumed</em>
Answer:
(a)
(b)
(c)
(d)
Explanation:
<u>Sinusoidal Waves </u>
An oscillating wave can be expressed as a sinusoidal function as follows
Where
The voltage of the question is the sinusoid expression
(a) By comparing with the general formula we have
(b) The period is the reciprocal of the frequency:
Converting to milliseconds
(c) The amplitude is
(d) Phase angle:
Answer:
The potential difference is 121.069 V
Solution:
As per the question:
Diameter of the cylinder, d = 9.0 cm = 0.09 m
Length of the cylinder, l = 40 cm = 1.4 m
Average Resistivity,
Current, I = 100 mA = 0.1 A
Now,
To calculate the potential difference between the hands:
Cross- sectional Area of the Cylinder, A =
Resistivity is given by:
Now, using Ohm's Law:
V = IR